Android实现二级购物车的全选加反选、总价功能

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.View;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.TextView;
import java.util.ArrayList;
import wangyaowei.bw.com.shopcart.adapter.ShopAdapter;
import wangyaowei.bw.com.shopcart.bean.DataBean;
import wangyaowei.bw.com.shopcart.bean.ListBean;
import wangyaowei.bw.com.shopcart.bean.ShopBean;
import wangyaowei.bw.com.shopcart.presenter.GoodsPresenter;
import wangyaowei.bw.com.shopcart.view.GoodsView;
public class MainActivity extends AppCompatActivity implements GoodsView {
private RecyclerView rlv_shop;
private GoodsPresenter goodsPresenter;
private CheckBox box_all;
private ShopAdapter shopAdapter;
private ArrayList<DataBean  data;
public TextView sum;
public int nums;
public Double prices;
public double total;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sum = findViewById(R.id.sum);
rlv_shop = findViewById(R.id.rlv_shop);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
rlv_shop.setLayoutManager(linearLayoutManager);
goodsPresenter = new GoodsPresenter(this);
goodsPresenter.relaed();
box_all = findViewById(R.id.box_all);
}
@Override
public void onResult(ArrayList<DataBean  data) {
this.data=data;
shopAdapter = new ShopAdapter(MainActivity.this, data);
rlv_shop.setAdapter(shopAdapter);
setaaa();
}
private void setaaa() {
box_all.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(box_all.isChecked()){
for(int i=0;i<data.size();i++){
DataBean dataBean = data.get(i);
dataBean.setFlag(true);
ArrayList<ListBean  list = dataBean.getList();
for (int j = 0; j < list.size(); j++) {
ListBean listBean = list.get(j);
listBean.setFlags(true);
}
}
}
else {
for(int i=0;i<data.size();i++){
DataBean dataBean = data.get(i);
dataBean.setFlag(false);
ArrayList<ListBean  list = dataBean.getList();
for (int j = 0; j < list.size(); j++) {
ListBean listBean = list.get(j);
listBean.setFlags(false);
}
}
}
shopAdapter.notifyDataSetChanged();
getPrice();
}
});
}
private void getPrice() {
total = 0;
int sums=0;
for (int i = 0; i < data.size(); i++) {
DataBean dataBean = data.get(i);
ArrayList<ListBean  list = dataBean.getList();
for (int j = 0; j < list.size(); j++) {
ListBean listBean = list.get(j);
if (listBean.isFlags()){
String num = listBean.getNum();
nums = Integer.valueOf(num);
String price =listBean.getPrice();
prices = Double.valueOf(price);
total += nums * prices;
sums++;
}
}
}
sum.setText(total +"");
}
}

public class ShopAdapter extends RecyclerView.Adapter<ShopAdapter.MyViewHolder  {
Context context;
ArrayList<DataBean  beans;
public ShopAdapter(Context context, ArrayList<DataBean  beans) {
this.context = context;
this.beans = beans;
}
@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
View view=LayoutInflater.from(context).inflate(R.layout.shop_layout,null,false);
MyViewHolder myViewHolder = new MyViewHolder(view);
return myViewHolder;
}
@Override
public void onBindViewHolder(@NonNull MyViewHolder myViewHolder, int i) {
myViewHolder.name_shop.setText(beans.get(i).getSellerName());
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(context);
myViewHolder.rlv_goods.setLayoutManager(linearLayoutManager);
ArrayList<ListBean  list = beans.get(i).getList();
GoodsAdapter goodsAdapter = new GoodsAdapter(context, list);
myViewHolder.rlv_goods.setAdapter(goodsAdapter);
myViewHolder.box_shop.setChecked(beans.get(i).isFlag());
}
@Override
public int getItemCount() {
return beans.size();
}
public class MyViewHolder extends RecyclerView.ViewHolder {
private final TextView name_shop;
private final CheckBox box_shop;
private final RecyclerView rlv_goods;
public MyViewHolder(@NonNull View itemView) {
super(itemView);
name_shop = itemView.findViewById(R.id.name_shop);
rlv_goods = itemView.findViewById(R.id.rlv_goods);
box_shop = itemView.findViewById(R.id.box_shop);
}
}
}

public class GoodsAdapter extends RecyclerView.Adapter<GoodsAdapter.MyViewHolder  {
Context context;
ArrayList<ListBean  beans;
private int shu;
public GoodsAdapter(Context context, ArrayList<ListBean  beans) {
this.context = context;
this.beans = beans;
}
@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
View view=LayoutInflater.from(context).inflate(R.layout.goods_layout,null,false);
MyViewHolder myViewHolder = new MyViewHolder(view);
return myViewHolder;
}
@Override
public void onBindViewHolder(@NonNull final MyViewHolder myViewHolder, int i) {
myViewHolder.name_goods.setText(beans.get(i).getTitle());
myViewHolder.price_goods.setText(beans.get(i).getPrice()+"");
String num = beans.get(i).getNum();
shu = Integer.parseInt(num);
myViewHolder.addview.nums.setText(shu +"");
Glide.with(context).load(beans.get(i).getImages()).into(myViewHolder.img_goods);
myViewHolder.box_goods.setChecked(beans.get(i).isFlags());
myViewHolder.addview.jia.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
shu++;
myViewHolder.addview.nums.setText(shu +"");
}
});
myViewHolder.addview.jian.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (shu =1){
shu--;
myViewHolder.addview.nums.setText(shu +"");
}else {
Toast.makeText(context, "已经最少不能减了", Toast.LENGTH_SHORT).show();
}
}
});
}
@Override
public int getItemCount() {
return beans.size();
}
public class MyViewHolder extends RecyclerView.ViewHolder {
private final TextView name_goods,price_goods;
private final ImageView img_goods;
private final AddView addview;
private final CheckBox box_goods;
public MyViewHolder(@NonNull View itemView) {
super(itemView);
name_goods = itemView.findViewById(R.id.name_goods);
price_goods = itemView.findViewById(R.id.price_goods);
img_goods = itemView.findViewById(R.id.img_goods);
addview = itemView.findViewById(R.id.addview);
box_goods = itemView.findViewById(R.id.box_goods);
}
}
}